The First Benchmarks Of Unity On XMir: There's A Performance Hit

OpenArena 0.8.5, which is a rather CPU-limited game and doesn't even make use
of GLSL, saw no performance difference at 800 x 600 but at 1920 x 1080, the old
game saw its frame-rate drop by about 25% with going through XMir.

The GLSL-using OpenArena 0.8.8 release also suffered from performance overhead
with XMir.

There was slight performance degradation for the Prey (id Tech 4) commercial
game when tossing XMir into the equation.